Skiving machine



Sept. 1,1926.-

' 1,598,629 H- B. WELCH .4

SKIVING MACHINE Patented Sept. 7, 1926.

UNITED srA'rEs PATENT OFFICE.

HERMAN B. WELCH, OF JOELIN, MISSOURI, ASSIG-NOR TO THE MEEKER COMPANY, 0F

JOPLIN, MISSOURI, A CORPORATON OF MISSOURI. n i

sKIvING MACHINE.

Application filed August 14, 1925. Serial No. 50,216.

This invention relates to skiving machinerv.

An object of the invention is to provide improvements for use in skiving machines whereby strips of leather may be cut to different thicknesses with rounded or beveled edges obtained by cutting the leather from one side of the leather strips, so that the strip produced by operation of the machine has a thick longitudinal central portion and attenuated side edges. Y

Another object of the invention is to provide adjustable and removable devices for use in connection with existing skiving machines for obtaining the desirable results herein disclosed.

Other objects will appear from the following description, reference being made to the accompanying drawing, in which Fig. 1 is a cross sectional view of the frame of a skiving machine having the present invention embodied therein. j

Fig. 2 is a side elevation with parts shown in section.

Fig. 3 is an enlarged view illustrating important features of the present invention.

Fig. 4 is a cross sectional view showing the shape of a strip of leather obtained by use of this machine.

The machine and the driving mechanism of the machine are of well known commercial type. erating mechanism. A shaft 2 is ournaled in the frame and extends toward the front side thereof. A worm gear 3 on the shaft 2 is driven by a worm 4 on a drive shaft 5. An arm 6 supported near the front side of the frame has a rearwardly extended arm 7 on its inner end which maintains alinement with the shaft 2. The shaft 2 cooperates with the extended arm 7 to support the feed roll of the machine the novel structure of which constitutes a part "of the present invention.

The machine in which the present invenV tion is embodied also comprises an arm having a depending frame part 9 terminating above the frame 1 and supporting the adjustable presser foot support 10 which is capable of vertical adjustment by an adjusting screw 11 and is held from turning by a structure comprising a flat end portion 12 adjustable in the slots 13 in the lower and of the :trame part 9.

The frame 1 encloses part of the opf attached to the end of a shaft 15 and is driven by the same driving mechanism from which the feed roll shaft 2 is driven, and in the machine shown the knife 14 turns in a counterclockwise direction (Fig. l).

The leather strips are fed to the knife 14 and guidedin the proper shape for cutting `by means of the present invention. The

feed roll 16 has one end rotative on the eX-I tension 7 and the opposite end clutched to the shaft 2. rEhe feed roll 16 is formed with a circumferential rib or flange 17 having its outer edge rounded and serrated, so that it will feed the strips of leather positively toward the knife 14 which rotates when the feed roll is rotated. The edge of the rib or iiange 17 is slightly within the plane of the annular knife 14.

The presser foot 18, the novel structure of which constitutes a part of the present invention, is mounted on a pivot 19 in connection with the lower end of the presser foot support 10. As will be seen by reference to Figs. land 3 the lower edgeof the presser' foot is concaved upon approximately the same radius of curvature as the radius of curvature of the knife 14 and the feed roll 16.

A spring 20 is attached to the frame part 9 and engages one arm of the presser foot 18 and holds the same against the end of an adjusting screw 21 by adjustment of which the presser foot may be held in any desired relationship to the feed roll and the knife. The lower edge 22 of the presser foot inclines upwardly and laterally and is formed with a recess 23 into which the strip of leather passing through the machine is pressed and given shape by the rib or flange 17. By reference to Fig. 3 it will be seen that the strip of leather 24 by cooperation of the presser foot and the feed roll is fed to the knife 14 in such a way that the knife will bevel both side edges of the strip, producing a strip of the cross sectional shape shown in Fig. 4. This is because the strip of leather passing to the knife is curved transversely on a shorter radius of curvature than the curvature of the knife.

lt is apparent `that series of feed rolls and presser feet may be provided to skive strips of Leather 01E different widths, thickness and shapes. if canteiuplat siilcb. variation The cylindrical knife 14 of the machine isv such other changes as may be required to adapt the machine for purposes for Which it is intended. y n I do not restrict myself unessentially, but What fclaim' and' desire to secure by Letters Patent is L 1. In a skiving machine, the combination With an annular rotary skiving knife', of a feed roll having peripheral longitudinal curvature upon approximately the same radius as the curvature' of 'the knife7 a circumferential flange lon said roll, andv a presser foot having a recess in radi-al alinement with said flange and cooperating with saidV feed roll to curve the Work transversely upon a shorter radius of curvature than the curvature of the surface of the roll or the curvature of the knife.

:2. A skiving machine comprising an annular rotary knife, in combination With a to the yedge of the lmifethan the-remainder of the surface of the roll, and a presser foot for pressing the Work into contact with the feed roll. e

3. A skiving machine comprising an annular rotary knife, in combination with a feed roll rotative on an axis rat right 'angles to the aXis'of the knife, a circumferential flange upon the feed roll extending closer to the edge of the knife than the remainder of the surface of the roll, and a presser foot for .pressing the work into cont-act with the feed roll, -and having a notch in radial alinement with said flanGe.

HRMAN B. WELCH, 

